GN: Use -Wl,-filelist for rsp files on mac instead of @

GN: Use -Wl,-filelist for rsp files on mac instead of @

The mac GN build exceeds the command line limit when linking large
targets like webkit_unit_tests. The fix is to pass a response file to
the linker instead of passing a list of object files. Passing this by
@rspfile ends up expanding the list before calling clang, so this instead
passes it via the filelist parameter.

BUG=386046
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=278424

[Nico, 2014-06-18 23:32:12]

"cl descriptions should answer 'why?'"

[Nico, 2014-06-18 23:32:28]

…but other than that, lgtm

[Nico, 2014-06-18 23:33:53]

win already uses in_newline, only linux still uses rspfile_content = $in now.
Might want to make that consistent maybe.

[jamesr, 2014-06-18 23:39:55]

I'd rather not change things on linux until we see a problem there.

[jamesr, 2014-06-18 23:39:57]

The CQ bit was checked by jamesr@chromium.org

[commit-bot: I haz the power, 2014-06-18 23:42:40]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/jamesr@chromium.org/340233002/1

[commit-bot: I haz the power, 2014-06-19 08:31:42]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-06-19 08:31:43]

Try jobs failed on following builders:
  chromium_presubmit on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/chromium_presubmit/bu...)

[jamesr, 2014-06-19 17:50:49]

Brett, could you OWNERS approve + CQ? Thanks!

[brettw, 2014-06-19 17:58:13]

lgtm

Whoopps, sorry.

[commit-bot: I haz the power, 2014-06-19 18:16:44]

Change committed as 278424